公众号： java乐园

上一篇简介了Zipkin Server的搭建，但是从Spring boot 2.x版本后，Zipkin官网已经不再推荐自己搭建定制Zipkin，而是直接提供了编译好的jar包。详情可以查看官网：
https://zipkin.io/pages/quickstart.html

有了Zipkin Server还不能对微服务的调用链路进行人祸监控，Zipkin Server可以被认为是一个数据处理和展示中心，那它的数据哪里来呢？需要Zipkin Client作为代理连接到Zipkin Server源源不断的上送过来。今天讲解一下如何在微服务中引入Zipkin Client，然后结合Zipkin Server监控各微服务间的调用链路。整体调用链路图如下：

涉及的项目：
注册中心：sc-eureka-server
Zipkin server：sc-zipkin-server
微服务：sc-zipkin-client-web、sc-zipkin-client-service

1、 新建项目sc-zipkin-client-service，对应的pom.xml文件如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>spring-cloud</groupId>
	<artifactId>sc-zipkin-client-service</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>sc-zipkin-client-service</name>
	<url>http://maven.apache.org</url>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.4.RELEASE</version>
	</parent>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>

		</dependencies>
	</dependencyManagement>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zipkin</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>
</project>

备注：主要引入了spring-cloud-starter-zipkin，说明这是一个zipkin client。

2、 新建配置文件application.yml

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:5001/eureka/
      
server:
  port: 9201
spring:
  application:
    name: sc-zipkin-client-service
  zipkin:
base-url: http://localhost:9000

3、 sc-zipkin-client-service（普通的微服务）项目其他项目文件如下图

4、 新建项目sc-zipkin-client-web，对应的pom.xml文件如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>spring-cloud</groupId>
	<artifactId>sc-zipkin-client-web</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>sc-zipkin-client-web</name>
	<url>http://maven.apache.org</url>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.4.RELEASE</version>
	</parent>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>

		</dependencies>
	</dependencyManagement>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zipkin</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-openfeign</artifactId>
		</dependency>
	</dependencies>
</project>

备注：同样引入了spring-cloud-starter-zipkin，说明是一个zipkin client

5、 新建配置文件application.yml

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:5001/eureka/
      
server:
  port: 9202
spring:
  application:
    name: sc-zipkin-client-web
  zipkin:
    base-url: http://localhost:9000

6、 sc-zipkin-client-web（普通的微服务）项目其他项目文件如下图

7、 验证
项目启动顺序：
sc-eureka-server
sc-zipkin-server
sc-zipkin-client-service
sc-zipkin-client-web
访问注册中心：http://127.0.0.1:5001/
服务都已经注册成功

访问Zinkin Server：http://localhost:9000/zipkin/

目前zipkin server没有记录任何的微服务调用链路数据。
分别访问接口：
http://127.0.0.1:9202/user/listUser

http://127.0.0.1:9202/user/getUser/1

再次查看Zipkin Server（如果没有出现可以多访问几次接口，Zipkin需要更多的监控数据）